Sash-balance.



No. 700,8l4. Patented May 27, I902.

' a. B. PICKOP & w n. CURBIN.

SASH BALANCE.

(Application filed Feb. 27,1902.)

(No Model.) 2 Shaets-$heat l.

Ell

, Patented May 27, I902. G. B. PICKUP &. W. B. COBBIN.

SASl-l BALANCE.

(Applicatio x filed Feb. 27, 2902.)

2 Sheets-$heet 2.

(No Model.)

UNITED STATES PATENT OFFICE.

GEORGE B. PICKOP AND VILBUR R. CORBIN, OF NEl/V BRITAIN, CONNECTI- CUT, ASSIGNORS TO P. & F. CORBIN, OF NEIV BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

SAS HQ-BALANC E.

SPECIFICATION forming part'of Letters Patent No. 700,814, dated May 27, 1902. Application filed February 2'7,'19O 2. Serial No. 96,002; (No model.)

, another sleeve in line with the sleeve F and Be it known that we, GEoRGE B. PICKOP' also havinga bearing upon the spindle E. and WILBURR. CORBIN,citizens of the United The sleeve F may rotate upon'the spindle E; States, residing at New Britain, county of but the sleeve G is prevented from rotating Hartford, State of Connecticut, have invented thereon by means of abearing at the outer end certain newand usefulImprovements in Sashof said sleeve G upon the square end E of Balances, of which the following is a full, said spindle. 'Consequently while the sleeve clear, and exact description. G mayrevolve with thespindle E it may be Our invention relates to what We may term moved longitudinally thereon, the length of 10 a sash balance operating mechanism the square bearing E being sufficient to give which may be employed in connection with the desiredfreedom of'longitudinal move; double sliding window-sash. ment. The adjacent ends of the sleeves F The object of the invention is to provide and G are provided with deep teeth F G, simple and effective means whereby the rais which may mesh with each other or be freed I 5 ing of one window will lower the other, or, from each other at the will of the operator and vice versa, wherebyeither of the windows may for the purpose hereinafter described. be moved up or down at will, and whereby the Upon the outer end of the sleeve G is a cirwindows, or either of them, may be set'at cular rack G formed by annular ridges, and any desired position, open or closed, and there H is a member rotatably mounted in the lug 2o locked. extensions I I upon the case or housing J.

The invention does away with the use of The member H performs the function of a sash cords and weights such as are commonly pinion, in that it is preferably toothed to enemployed and in other ways embodies adgage with the circular rack G so that the said vantages obvious to one skilled in the art member Il may be constantly in mesh with 2 5 and as will be understood from a reading of said rack G Manifestly the rotation of the 7' 5 the following specification and an examinamember H will move the sleeve G longitudition of the drawings. nally upon the spindle E, and by this means In the drawings, Figurelisaconventional the teeth G may be partially or entirely view, in front elevation, of a window-sash freed from engagement with the teeth F upon 0 fitted with our improved operating mechansleeve F. ism. Fig. 2 is a fragmentary view, relatively K is a spring secured at one end to the case enlarged, of certain parts of our invention. J and at the other end tothe sleeve F. Fig. 3 is a similar view to Fig. 2, partsbeing L is a spring which may be secured at one shown in adifferent position. Fig. isahoriend to the case J and at the other end to the 35 zontal section on the line 4: 4 of the apparatus sleeve G. as it appears in Fig. 1, the parts being rela- The function of the springs K and L is as tively enlarged. Fig. 5 is an elevation of the follows: Assuming the sash A to be the lower inner end of-the improved mechanism drawn sash, it will be seen that the rack A engages To all whmn it bury concern:

to a scale similar to Fig. 4:. withthe geared wheelD. Consequentlywhen 4o ABare windows movable in suitable guidethe window is raised the sleeve F will be roways in the window-casing. tated. In order to permit the user to easily A B are toothed racks carried by the winraise the window A, the said spring K is undo ws A B, respectively, at or near 1 the side der its highest tension when the windowA is thereof. These racks are preferably formed in its lowermost position. Consequently the 5 of sheet metal. tendency of the spring'K will be to lift the 5 C D are gear-wheels in mesh with the racks window. By properly adjusting the tension B A, respectively. The gear-wheel C is carit may be such that it will require but little ried by a shaft or spindle E. The gear-wheel force upon the operators part to lift said win- D is carried by a sleeve or hub F, which has dow A, the tension of the spring supplying 50 a rotative bearing upon the spindle E. G is the balance'of the needed power. When the window B, which may be assumed to be the uppermost window, is raised to its highest position, the spring L is under its lowest tension. As the window B is lowered the gear C is rotated and the spindle E will rotate the sleeve G through the square bearing E. This rotation of the sleeve G winds up the spring L, and therefore increases the tension therein. Consequently when the operator desires to raise the upper window B but little forceis needed, the balance of the power being supplied by the spring L. Upon that portion of the sleeve G outside of the case J are formed teeth G and upon'the adjacent portion of the case J are formed corresponding teeth J. This is best seen in Figs. 2 and 8. These teeth J and G are shorter than the teeth F and G. In practice it is our custom to make the former about half the length of the latter. The reason for this will be understood from the description of the operation of the device.

M is an operating-handle, which may be in the form of a crank-arm extending from the member H, which we shall term herein as the controllingmember. TheleverMweshall refer to herein as the controlling-handle.

N is a rack which is by preference provided with notchessay three in number, as shown in Figs. 2 and 3. The operating-handle M yieldingly bears in any one of the notches in said rack N andis frictionally retained in any one of the three positions. We have designated the notches by the numbers corresponding to the one in use in the different figures.

It is our practice to construct the case J of two parts, so as to facilitate access to the interior of the same and replace or adjust the parts therein.

To prevent longitudinal movement of the sleeve F upon the spindle E, we provide an annular groove in said spindle E and attach to the sleeve F a tenon O, which projects into said groove, so that the sleeve F cannot slip longitudinally. This tenon 0 may be in the form of a plate extending through the slot in the side of said sleeve, wherein it may be secured by means of a screw 0, access to the head of which may be gotten through alined openings passing through the gear-wheels C D, as indicated in dotted lines, Fig. 4. This is merely one convenient form of preventing longitudinal shifting of the sleeve F on said spindle E.

In operation the parts are shown in Fig. 4 to be locked-that is, it will be seen that the teeth G upon the rotatable sleeve G are in mesh with the teeth J upon the stationary case J. Consequently the sleeve Gcannot be rotated nor can the spindle E be rotated because of the square bearing E, which provents the independent rotation of the spindle E and sleeve G. In this view it is also seen that the teeth G project their full extentinto thespacesbetween the teeth F. Consequently the sleeves F and Gv are locked together and one cannot rotate independently of the other.

Inasmuch as the window A cannot be moved unless it is possible to rotate the gear-wheel D, and inasmuch as the window B cannot be moved unless it is possible to rotate the gearwheel C, and inasmuch as said gear-wheels are shown in Fig. 4 to be locked, it follows that the windows A and B are locked in whatever positionsthey happen to be in. 1 By moving the operating-handle M from the notch with which it is in engagement in Fig. 4 to the notch with which it is in engagement in Fig. 3 the teeth G on the sleeve G are freed from the stationary teeth J. Thus the sleeve G may be rotated; but inasmuch as the teeth G are not freed from the teeth F the sleeve G cannot be rotated independently of the sleeve F. Consequently if when the parts are in this position the window A is moved up or down an opposite movement is necessarily imparted to the window B, because the moving of the window A rotates the gear-wheel D and the sleeve F, which necessarily rotates the sleeve G, which in turn necessarily rotates the spindle E through the square bearing E, which in turn rotates the gear C, and which in turn meshing with the rack B imparts movement to the window B. Inasmuch as the racks A B are on opposite sides of the gear-wheels C D,it follows that the movement of the window A up or down imparts an opposite movement to the window B. It is possible by shifting the position of the operatinghandle from that shown in Fig. 3 to that shown in Fig. 4 to lock the windows at any desired position. Now assume the operating-handle M is moved into the position shown in Fig. 2. This movement shifts the sleeve Gstill farther to the right and entirely frees the teeth G from the teeth F. In this position it is manifest that either window A or B may be moved up or down. The movement of the window A will rotate the sleeve F; but inasmuch as this sleeve is disconnected from the sleeve G and the spindle E no rotative movementwill be imparted to these members, and consequently the window B will remain in whatever position it happens to be in. So, also, the raising or lowering of the window B will rotate the gear C, spindle E, and the sleeve G; but this movement will not be imparted to the sleeve F. Consequently the movement of the window B may be entirely independent of the window A. Thus the apparatus makes it possible to lock both the windows in whatever position they may happen to be, or it may so engage said windows and their associated parts that the opening of one will open the other or the closing of one will close the other, or they may be so freed from engagement that either window may be moved independently of the other. No greater freedom of action could be desired.

The case J may be inserted in a box in the window-frame in any way such as would suggest itself to the carpenter skilled in the art. The illustrations are purely conventional in this regard. It is preferred that the gearwheels 0 D be spaced slightly apart, so that in the event the teeth upon said gear-wheels are not in exact register sufficient space will be provided between said gear-wheels to ad mit of the rack A entering said space and being shifted. slightly, so as to register with the teeth on the gear-wheel C When it is desired to remove the window A. Manifestly either. of the windows may be removedwithout removing the operating and lockin g mechanism.

What we claim is- 1. In a device of the character described, a pinion, a spring anchored at one end and secured at its other end to said pinion or an extension thereof, asecond pinion concentric with the first-mentioned pinion and another spring, said second spring being anchored at one end and secured at its other end to said second pinion or an extension thereof, and means to engage and disengage said pinions.

2. In a device of the character described, a pinion, a spring anchored at one end and secured at its other end to said pinion or an extension thereof, a second pinion concentric with the first-mentioned pinion and another spring, said second spring being anchored at one end and secured at its other end to said second pinion or an extension thereof, meansto engage and disengage said pinions, and means to lock said pinions against rotation.

3. In a device of the character described, a pinion, a spring anchored at one end and secured at its other end to said pinion or an extension thereof, a second pinion and another spring, said second spring being anchored at one end and secured at its other end to said second pinion or an extension thereof, and a clutch device carried by each of said pinions one of said clutch devices being movable laterally of said pinions to engage or disengage the other clutch device.

4. In a device of the character described, a pinion, a spring anchored at one end and secured at its other end to said pinion or an extension thereof, a second pinion and another spring, said second spring being anchored at one end and secured at its other end to said second pinion or an extension thereof, and a clutch device carried by each of said pinions one of said clutch devices being movable laterally of said pinions to engage or disengage the other clutch device, a locking-clutch carried by said movable clutch device and a stationary member adjacent said locking-clutch adapted to receive and hold the latter against rotation.

5. In a device of the character described, a pair of pinions, a shaft extending from one and a sleeve extending from the other and surrounding said shaft, a second sleeve mounted on the end of said shaft and free to shift loncent ends of said sleeves, means to shift said second sleeve, and means to lock said second sleeve and thereby both of said pinions when said teeth and locking means are in simultaneous operative engagement.

7. In a device of the character-described, a pair of pinions, a shaft extending from one and a sleeve extending from the other and bearing upon said shaft, a second sleeve on that portion of said shaft extending beyond said first sleeve, said second sleeve being lon gitudinally but not rotatably mounted relatively to said shaft, long clutch-teeth at the adjacent ends of said sleeves and short clutchteeth on another portion of said second sleeve, and a stationary member bearing short teeth to coact with said short teeth on said second clutch to look all of said parts when both of said sleeves are interlocked.

8. In a device of the character described, a pair of pinions, means for interlocking the same, said means including a revoluble memher, a circular rotatable rack carried thereby and a pinion in mesh therewith, the axis of said rack being at an angle to the axis of said pinion 9. In a device of the character described, a pair of pinions,-means for interlocking the same and locking said interlocked pinions with a stationary part, springs connected with said pinions and with a suitable stationary part, and a rack in mesh with each of said pinions and windows carrying said racks.

10. In a device of the character described, a pair of toothed pinions, a rack for each of said pinions, a clearance-space between said pinions about equal to the thickness of one of said racks.

11. In a device of the character described, a

pair of toothed pinions, a rack for each of said pinions, a clearance-space between said Witnesses:

O. A. BLAIR, G. E. ROOT. 

